Single Led flasher circuit.

[Daniedp]

Hallo guys.
I need a simple single Led flasher circuit that can operate from a 9v and 12v source.
Thanks in advance.
Ps this Must work on veroboard.

 

[Nanren888]

Various 555 timer versions will run at those voltages. (google 555 led flasher?)
.
Also an old favourite UJT. (Google ujt led flasher)
.
Google it?

 

[Daniedp]

Various 555 timer versions will run at those voltages. (google 555 led flasher?)
.
Also an old favourite UJT. (Google ujt led flasher)
.
Google it?

Thanks not going to use 555 but rather use the ujt type circuit. Question is if I can find the parts at my local electronics shop as they dont always keep the parts with certain codes. But I will Google some more in ujt circuits.
Many thanks.

 

[Nanren888]

UJTs are not really a modern component, but 2N2646 is still relatively common, I suspect.
There are also flashers based on bipolar transistors that are almost as simple.
.
If you don't mind winding a coil, there's also something called a Joule thief.

 

[Bluejets]

Cheapest ujt I could find was about $5.00.....
Talkingelectronics has heaps of gear like this flasher......
http://www.talkingelectronics.com/te_interactive_index.html

look down the left hand side index

 

[Daniedp]

Thanks all.
Any circuits you know works?
Spend afternoon on a Google circuit which to no surprise again doesn't work

 

[bertus]

Hello,

There are also blinking leds available:
https://za.rs-online.com/web/c/?searchTerm=blinking+led
They seem to work from 3.5 to 14 Volts.

Bertus

 

[Bluejets]

Any circuits you know works?

Didn't look at my link then...??

 

[bertus]

Hello,

I think that @Bluejets is trying to point you to this page:
http://www.talkingelectronics.com/projects/FlasherCircuits/Page83FlasherCircuitsP1.html

Bertus

 

[Daniedp]

Hello,

There are also blinking leds available:
https://za.rs-online.com/web/c/?searchTerm=blinking+led
They seem to work from 3.5 to 14 Volts.

Bertus

Yes I wish I could get them but I am 100's of km away from my nearest electronics shop. That's why I struggling with this type of circuits.

 

[Daniedp]

Didn't look at my link then...??

Thanks again I am working long hours so pardon me if I don't respond immediately.

 

[Daniedp]

Didn't look at my link then...??

Just had a look a million thanks again. Wish everyone can respond as positively as you and the others.

 

[Daniedp]

Hello,

There are also blinking leds available:
https://za.rs-online.com/web/c/?searchTerm=blinking+led
They seem to work from 3.5 to 14 Volts.

Bertus

Thanks Bertus
Are you from RSA?

 

[bertus]

Hello,

No, but you have a country given.

Bertus